摘要
通过对鄂尔多斯盆地油坊庄地区长2油藏烃源岩的分布与演化、构造特征、有利相带、储层特征以及保存条件等因素的系统研究,认为巨厚的烃源岩是油气成藏的基础,分流河道汇合部位厚砂体是油气富集的主要场所,高闭合度的鼻状隆起对油气藏形成具有重要的控制作用,大规模溶蚀作用形成的局部高孔高渗带是油气聚集成藏的有利地区,良好盖层是油气藏形成的重要条件.在此基础上划分出了4个有利勘探区带:元122-定108井区、洼101-元106井区、定34-定603井区、定57-定48井区.
Through the all-around analysis of the source rock distribution and evolution,structural characters,favorable facies belts,reservoir characteristics and preservation conditions of Chang2 reservoir in Youfangzhuang area,it is held that hugely thick source rock is the foundation of hydrocarbon accumulation,the thick sandstone at the junction of distributary channels is the primary position for hydrocarbon accumulation,the nose-shape uplift of high closure noses has important control effects on hydrocarbon accumulation,the high-porosity and high-permeability zones formed by large-scale dissolution are the favorable areas for hydrocarbon accumulation,and good cap rock is the important condition for hydrocarbon accumulation.Based on these researches,four favorable exploration zones are found in the studied area:Yuan122-Ding108,Wa101-Yuan106,Ding34-Ding603,Ding57-Ding48 well-blocks.
出处
《西安石油大学学报（自然科学版）》
CAS
2007年第4期5-8,6,共4页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家"973"计划项目(编号:G1999022507)
关键词
鄂尔多斯盆地
有利勘探区带
成藏
主控因素
油坊庄地区
Ordos Basin
Youfangzhuang area
hydrocarbon accumulation
main control factor
favorable exploration belt
